Thank you for your reply very much, as you know, Intel Celeron N2840 is an SoC processor, or in other words all components have been integrated onto one single chip. So the AHCI logic is located onto this processor too! If there is AHCI driver for such processors provided by Intel rather than merely the version provided by Microsoft, that would be a good thing.

itaniumfans: You are welcome. Thank you very much for providing those details. From our side, there are no AHCI drivers available for this unit, but since the Intel® Celeron N2840 is a SoC processor, we recommend to visit our Intel® Embedded communities, in there you will find peer to peer assistance and they might be able to provide further details about the driver you are looking for:https://embedded.communities.intel.com/community/en/